Improve categorizations (again), add XIAO RP2040 (#345)

Improve categorization
- Better classification of DiscreteComponents instead of
InternalSubcircuit
- Remove InternalBlock from super-superclasses of some microcontrollers
- anything inheriting InternalBlock (even transitively) is internal

Add XIAO RP2040 and a basic keyboard example that uses the dev board.

electronics_abstract_parts/AbstractFuse.py

@@ -8,7 +8,7 @@
 
 
 @abstract_block
-class Fuse(InternalSubcircuit, Block):
+class Fuse(DiscreteComponent, Block):
   @init_in_parent
   def __init__(self, trip_current: RangeLike, *, hold_current: RangeLike = RangeExpr.ALL,
                voltage: RangeLike = RangeExpr.ZERO) -> None:

electronics_abstract_parts/AbstractJumper.py

@@ -1,9 +1,9 @@
 from electronics_model import *
-from .Categories import InternalSubcircuit, TypedJumper
+from .Categories import DiscreteComponent, TypedJumper
 
 
 @abstract_block
-class Jumper(InternalSubcircuit, Block):
+class Jumper(DiscreteComponent, Block):
   """A two-ported passive-typed jumper (a disconnect-able connection), though is treated
   as always connected for model purposes.
 

electronics_abstract_parts/Categories.py

@@ -252,7 +252,7 @@ class InternalSubcircuit(InternalBlock):
 
 
 @abstract_block
-class DiscreteComponent(InternalSubcircuit, Block):
+class DiscreteComponent(InternalBlock):
   """Discrete component that typically provides untyped ports (not to be be used directly), as a component to be used in an application circuit."""
   pass
 

electronics_abstract_parts/IoController.py

@@ -9,7 +9,7 @@
 
 
 @abstract_block
-class BaseIoController(PinMappable, InternalBlock, Block):
+class BaseIoController(PinMappable, Block):
   """An abstract IO controller block, that takes power input and provides a grab-bag of common IOs.
   A base interface for microcontrollers and microcontroller-like devices (eg, FPGAs).
   Pin assignments are handled via refinements and can be assigned to pins' allocated names.

electronics_abstract_parts/PassiveConnector.py

@@ -3,7 +3,7 @@
 
 
 @abstract_block
-class PassiveConnector(InternalSubcircuit, Block):
+class PassiveConnector(DiscreteComponent, Block):
   """A base Block that is an elastic n-ported connector with passive type.
   Interface only, no implementation.
 

electronics_lib/Microcontroller_Esp32.py

@@ -140,7 +140,7 @@ def _io_pinmap(self) -> PinMapUtil:
 
 
 @abstract_block
-class Esp32_Base(Esp32_Ios, InternalSubcircuit, GeneratorBlock):
+class Esp32_Base(Esp32_Ios, GeneratorBlock):
   """Base class for ESP32 series microcontrollers with WiFi and Bluetooth (classic and LE)
 
   Chip datasheet: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
@@ -179,7 +179,7 @@ def _system_pinmap(self) -> Dict[str, CircuitPort]:
     }).remap(self.SYSTEM_PIN_REMAP)
 
 
-class Esp32_Wroom_32_Device(Esp32_Base, FootprintBlock, JlcPart):
+class Esp32_Wroom_32_Device(Esp32_Base, InternalSubcircuit, FootprintBlock, JlcPart):
   """ESP32-WROOM-32 module
 
   Module datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf

electronics_lib/Microcontroller_Esp32c3.py

@@ -87,7 +87,7 @@ def _io_pinmap(self) -> PinMapUtil:
 
 
 @abstract_block
-class Esp32c3_Base(Esp32c3_Ios, InternalSubcircuit, BaseIoControllerPinmapGenerator):
+class Esp32c3_Base(Esp32c3_Ios, BaseIoControllerPinmapGenerator):
   """Base class for ESP32-C3 series devices, with RISC-V core, 2.4GHz WiF,i, BLE5.
   PlatformIO: use board ID esp32-c3-devkitm-1
 
@@ -127,7 +127,7 @@ def __init__(self, **kwargs) -> None:
     self.uart0 = self.Port(UartPort(dio_model), optional=True)
 
 
-class Esp32c3_Wroom02_Device(Esp32c3_Base, FootprintBlock, JlcPart):
+class Esp32c3_Wroom02_Device(Esp32c3_Base, InternalSubcircuit, FootprintBlock, JlcPart):
   """ESP32C module
 
   Module datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf
@@ -211,7 +211,7 @@ def generate(self) -> None:
         gnd=self.gnd, pwr=self.pwr, io=self.ic.en)
 
 
-class Esp32c3_Device(Esp32c3_Base, FootprintBlock, JlcPart):
+class Esp32c3_Device(Esp32c3_Base, InternalSubcircuit, FootprintBlock, JlcPart):
   """ESP32C3 with 4MB integrated flash
   TODO: support other part numbers, including without integrated flash
   """

electronics_lib/Microcontroller_Esp32s3.py

@@ -146,7 +146,7 @@ def _io_pinmap(self) -> PinMapUtil:
 
 
 @abstract_block
-class Esp32s3_Base(Esp32s3_Ios, InternalSubcircuit, GeneratorBlock):
+class Esp32s3_Base(Esp32s3_Ios, GeneratorBlock):
   """Base class for ESP32-S3 series microcontrollers with WiFi and Bluetooth (classic and LE)
   and AI acceleration
 
@@ -180,7 +180,7 @@ def __init__(self, **kwargs) -> None:
     self.uart0 = self.Port(UartPort(dio_model), optional=True)  # programming
 
 
-class Esp32s3_Wroom_1_Device(Esp32s3_Base, FootprintBlock, JlcPart):
+class Esp32s3_Wroom_1_Device(Esp32s3_Base, InternalSubcircuit, FootprintBlock, JlcPart):
   SYSTEM_PIN_REMAP: Dict[str, Union[str, List[str]]] = {
     'VDD': '2',
     'GND': ['1', '40', '41'],  # 41 is EP